The shares of the nation's income flowing to the top 1% and top 0.1% of households were higher in 2006 than in any year since 1928, according to an analysis of newly released IRS data by economists Thomas Piketty and Emmanuel Saez. Average pre-tax incomes in 2006 jumped by about $60,000 (5.8%) for the top 1% of households, but just $430 (1.4%) for the bottom 90%, after adjusting for inflation.